Chair with a surfboard-shaped back support



FIG. 1 is a right-side view of a preferred embodiment of the present invention;

FIG. 2 is a left-side view of the present invention;

FIG. 3 is a front view of the present invention;

FIG. 4 is a rear view of the present invention;

FIG. 5 is a top view of the present invention; and,

FIG. 6 is a bottom view of the present invention.

The broken ground lines shown in FIGS. 1 through 4 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for “chair with a surfboard-shaped back support”, as shown and described. 